Method for regulating power of direct-drive permanent-magnet synchronous wind generator set

Abstract

The invention relates to a method for regulating power of a direct-drive permanent-magnet synchronous wind generator set, which comprises the following steps of: A. acquiring the actual speed n of the generator; B. when n is less than the rated speed, executing step C, else, executing step D; C. computing the current torque given value M of the generator set, wherein when M is not greater than the rated torque, outputting M to the wind generator set, else, assigning M to the rated torque value and outputting M; D. acquiring the last M, wherein when M is smaller than the rated torque, executing step E, and when M reaches the rated torque, executing step F; E. gradually regulating the torque to the rated torque, and keeping the rotation speed at the rated speed; and F. regulating the generator set at the rated speed by using a pitch control system. The invention takes the actual air density of the wind field into account, introduces the optimal power regulation coefficient, simplifies the implementation procedure, conforms to the actual working conditions and realizes the real-time optimum efficiency of the power regulation for the wind generator set in the whole process, thereby overcoming the insufficiencies in the prior regulation method.

Description

technical field [0001] The invention relates to a direct-drive permanent-magnet synchronous wind-driven generating set system, in particular to a direct-drive permanent-magnet synchronous wind-driven generating set power regulation method. Background technique [0002] The power regulation of the direct-drive permanent magnet synchronous wind turbine is a very critical link in the entire control system of the wind turbine, which directly affects the performance and efficiency of the whole machine. The power regulation of the existing direct-drive permanent magnet synchronous wind turbines usually adopts the direct torque control method, which is mainly realized in the form of a table based on the power curve provided by the wind turbine manufacturer, and then linearly interpolated through the table Calculate the actual torque given value and send it to the generator set. The disadvantage is that there are many programming codes. The torque given value calculated according to...

AI Technical Summary

Problems solved by technology

The power regulation of the existing direct-drive permanent magnet synchronous wind turbines usually adopts the direct torque control method, which is mainly realized in the form of a table based on the power curve provided by the wind turbine manufacturer, and then linearly interpolated through the table Calculate the actual torque given value and send it to the generator set. The disadvantage is that there are many programming codes. The torque given value calculated according to linear interpolation is not the actual optimal parameter, but realizes power generation control and power generation. Real-time optimal efficiency of the whole process of adjustment

[0003] It can be seen that the above-mentioned existing direct-drive permanent magnet synchronous wind turbine power regulation method obviously still has inconvenience and defects in method and use, and needs to be further improved urgently.

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